Question

Exercise 1 1. Create a simple Graphical User Interface (GUI): Create new JFrameForm and use the Palette to drag and drop the Swing Containers and Controllers like the figure shown. Your Form should accept number in its text field as Month. When the user press GO Button, the corresponding Month Name has to be displayed in the Label, otherwise, the Label text has to indicate that the number entered is invalid Convert month number to month name: W Gom The Month Name is: August

Answer 1

/**
* The java program that prompts user to enter a month number
* If mont number is invalid then set text to invalid otherwise
* display the name of the month
* */
//JFrameForm.java
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class JFrameForm extends JFrame
{

   private JPanel contentPane;
   private JTextField textField;

   /**
   * Launch the application.
   */
   public static void main(String[] args) {
       EventQueue.invokeLater(new Runnable() {
           public void run() {
               try {
                   JFrameForm frame = new JFrameForm();
                   frame.setVisible(true);
               } catch (Exception e) {
                   e.printStackTrace();
               }
           }
       });
   }

   /**
   * Create the frame.
   */
   public JFrameForm() {
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setBounds(100, 100, 404, 168);
       contentPane = new JPanel();
       contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
       setContentPane(contentPane);
       contentPane.setLayout(null);
      
       JLabel lblConvertMonthNumber = new JLabel("Convert month number to month name :");
       lblConvertMonthNumber.setFont(new Font("Tahoma", Font.BOLD, 14));
       lblConvertMonthNumber.setForeground(Color.RED);
       lblConvertMonthNumber.setBounds(10, 11, 285, 34);
       contentPane.add(lblConvertMonthNumber);
      
       textField = new JTextField();
       textField.setBounds(10, 53, 285, 26);
       contentPane.add(textField);
       textField.setColumns(10);
      

       JLabel lblNewLabel = new JLabel("The month name is :");
      
      
       JButton btnNewButton = new JButton("GO!");
       btnNewButton.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
              //create an array of month names
               String monthNames[]= {"January","February","March","April","May","June","July",
           "August","September","October","November","December"};
               //Parset text to integer
               int userNumber=Integer.parseInt(textField.getText());
               //check if user numbre is invalid
               if(userNumber<1 || userNumber>12)
                   //set month as invalid
                   lblNewLabel.setText("Invalid");
               else
               {
                   //set mont name
                   lblNewLabel.setText("The month name is :"+monthNames[userNumber-1]);
               }
              
           }
       });
       btnNewButton.setBounds(310, 53, 68, 26);
       contentPane.add(btnNewButton);
       lblNewLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
       lblNewLabel.setBounds(10, 90, 285, 29);
       contentPane.add(lblNewLabel);
      
   }
}

Sample Output:

Convert month number to month name : GO! The month name is :

- O X Convert month number to month name : GO! Invalid

- 0 x Convert month number to month name : GO! The month name is : January